1172 (The People's Chronology)
England's Henry II receives homage at Tipperary's 200-foot high Caskel Rock from Irish princes who include Donal O'Brien (see 1171). Henry has gone to Ireland in part to avoid the attacks of Pope Alexander III for the assassination of Thomas Becket; he grants Hugh de Lacy the lordship of Meath for providing the services of 50 knights, and when he returns to England in April he leaves de Lacy as constable of Dublin (see 1173).
Eleanor of Aquitaine raises Aquitaine against her faithless husband, Henry II, and he is forced to reconcile his differences with the pope (see 1169).
A Venetian mob assassinates the doge Vitale II Michiel (see 1171). The Venetian Grand Council revises the constitution to restrict the power of the doges and increase the power of the city-state's ruling oligarchy.
Alrude, countess of Bertinoro, leads an army to lift the siege of Aucona. She scatters the forces that have invested the town and defeats ambushers on her way home.
Nonfiction: Outline and Digest of the General Mirror (Tang Jian Gang Mu [Tung-chien kang-mu]) by Chinese neo-Confucian scholar Zhu Xi (Chu Hsi), 41.
Poetry: Roman de Rou by the Anglo-Norman poet Wace is a chronicle of the dukes of Normandy.